SU1539490A1 - Heat-pipe combined with heat-exchanger - Google Patents

Abstract

The invention relates to heat engineering, in particular to heat exchangers, and can be used as a heat exchanger in energy, process, heating installations and as a device for separating mixtures into individual components. The aim of the invention is to increase the heating capacity due to removal of non-condensing gases and the organized movement of steam and condensate streams, as well as to maintain the optimum filling level of the intermediate heat carrier. This is achieved by the fact that the condensation and evaporation parts of the individual heat pipes of the heat exchanger are separated from each other and assembled into bundles limited by their tube sheets, which, together with the split housing, form a single heat pipe. At the same time, a device for organized flow of steam and condensate, made in the form of a tray and standpipe, is installed under the condensation beam, and the detachable housing is equipped with a device for removing non-condensable gases and a device for controlling the level and feeding of the heat exchanger with an intermediate heat carrier. By means of this design, heat can be transferred between heat transfer media having different directions in space. 2 Il.

Description

The invention relates to heat engineering, in particular to heat exchangers, and can be used as a heat exchanger in energy, process, heating installations and as a device for separating mixtures into individual components.

The purpose of the invention is to increase the heat output.

FIG. 1 shows a diagram of a heat pipe - heat exchanger; in fig. 7 is a section A-A in FIG. one.

Heat pipe - sobbeat heat exchanger from a common steam chamber 1,

bundle of condensation tubes 2 and their tube sheets 3, lids 4 of the tube space of the condensation bundle with nozzles 5, and 6, tray 7 for collecting condensate 7, subtubular chamber 8 of the evaporative bundle, standpipe 9, devices 10 for monitoring the level of filling of the evaporator tubes by an intermediate heat carrier , evaporator tubes 11, devices 12 for feeding the heat exchanger with intermediate heat carriers, tube sheets

13 evaporative bundle device

14dl withdrawal of non-condensables

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gases, detachable housing 15, the input 16 and the output 17 of the nozzle primary heat carrier, the drainage device 18.

Heat pipe - the heat exchanger works as follows.

The nozzle chamber 8 and the lower part of the space of the evaporator tubes 11 are filled with an intermediate heat carrier through the device 12, the heat carrier level is monitored by the device 19. A secondary heat carrier is fed through the nozzles 5 or 6 into the bundle of condensation tubes, leaving them through the opposite nozzle. Evaporation tubes are placed in the flow of the primary coolant, which is fed into the housing 15 through the nozzle 16, and exits through the nozzle 17. As a result of the heat exchange between the primary and intermediate heat exchangers, the intermediate heat exchanger boils. The vapor exiting from the upper ends of the evaporator tubes passes between tray 7 and the wall of the steam chamber 1 (Fig. 2), goes to the condensation pipes 2. On the outer surface of the condensation pipes, the steam condenses, flows through the pipes into the tray 7 and through the standpipe 9 and is directed to the sub-chamber 8. In this way, the circulation of the intermediate coolant is organized. The heat released during condensation of the intermediate coolant is perceived by the secondary coolant. Non-condensable gases are periodically, and if necessary, continuously removed by the device 14. To perform mechanical cleaning of the condensation pipes, it is enough to open the covers 4.

To replace the tubes of the evaporative bundle, to clean these tubes from the primary coolant, to use different structural materials of the tubes, depending on the physicochemical properties of the intermediate coolant, the heat pipe — the heat exchanger is detachable in the condensation and evaporation parts. Rolling condensation and evaporator tubes and tube sheets makes it easy to replace broken tubes.

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The proposed construction is technologically feasible to manufacture, as it can be assembled with standard assemblies produced by the machine-building industry. It is reliable in operation, since the type of coolant and non-condensable gases do not limit its operating time. This structure has the ability to work in chemically aggressive environments; for this, the evaporative and condensation parts can be made of various structural materials. According to the proposed principle, it is possible to manufacture a heat exchanger of high unit capacity.

The use of the invention avoids the accumulation of non-condensable gases due to their systematic removal. At the same time, possible losses of the intermediate coolant are easily replenished through the device controlling its level and make-up during operation of the heat exchanger.

As a result, all the above signs lead to an increase in the intensity of heat transfer, and consequently, to the heat transfer coefficient, and lead to an increase in the heat output of the apparatus.

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Claims (1)

Invention Formula A heat pipe is a heat exchanger containing condensation and evaporation parts consisting of pipes fixed in tube sheets and enclosed in a detachable housing, which means that, in order to increase heat output, it is additionally equipped with a device for the organized movement of steam flows and condensation, installed under the condensation part and made in the form of a tray and standpipe, a device for removing non-condensable gases and a device for feeding the heat exchanger intermediate heat carrier, moreover, the condensing and evaporating parts are made of separated from each other tube bundles, bounded at both ends by two tube sheets, and the condensation and evaporating tube bundles together with a detachable body constitute a single heat pipe. b 13 1B Aa 2 fig 1